#include<iostream>
#include<vector>
#include<queue>
#include<cstring>
#include<cmath>
#include<map>
#include<set>
#include<cstdio>
#include<algorithm>
#define debug(a) cout<<#a<<"="<<a<<endl;
using namespace std;
const int maxn=2e5+1000;
typedef long long LL;
inline LL read(){LL x=0,f=1;char ch=getchar();	while (!isdigit(ch)){if (ch=='-') f=-1;ch=getchar();}while (isdigit(ch)){x=x*10+ch-48;ch=getchar();}
return x*f;}
int main(void){
   	cin.tie(0);std::ios::sync_with_stdio(false);
    string a,b;cin>>a>>b;
    bool flag=false;
    if(a==b) flag=true;
    for(int i=0;i<a.size();i++){
        int j=i+1;
        if(j>=a.size()) continue;
        string temp=a;
        swap(temp[i],temp[j]);
        if(temp==b){
                flag=true;
        }
    }
    if(flag){
        cout<<"Yes"<<endl;
    }
    else{
        cout<<"No"<<endl;
    }
   	return 0;
}
